Thanks for the post, Bernat,

I'll try not to hijack your post, but you mention the Datadrop several times so I think this is loosely on topic. (And truth be told, I've sent this very question to the data drop folks via the data drop contact link but that inbox might not be monitored all that frequently...) I'm very interested in integrating IoT/remote sensing concepts into my teaching, and RPi/Wolfram/Datadrop is in my opinion a low-hanging fruit solution. The 5-bin maximum for the free account (the only type of access that would be feasible for classroom purposes) has a big warning that bins expire after a month. However, I've seen bins in my account sitting there for much longer than a month. Is this warning no longer valid? Is it a "could be deleted"? If WRI is contemplating what are appropriate limits to the free service, bins that can persist for the semester (6 months) would be ideal for me.

On a similar note - in order to use this tool effectively in the classroom, I need better introductory materials. Wolfram typically has a "big explosions" approach to demonstrating features, which is cool if you have the time and talent to work through the code. (There is no doubt that one can do some amazingly complex things with compact code if you are highly experienced in Wolfram Language programming). I've yet to see a simple demonstration that shows how one takes a simple set of data, creates the correct structure (association), attaches units and interpretations, such that it can be easily viewed and analyzed through WolfrmaAlpha. Granted, I can take the time to put that together; however if WRI is interested in penetrating the education market with IoT, then providing these resources (so that I can focus on topical content) would be very helpful.